Description
Safety base rings made of Perbunan with an outer diameter of 33 mm provide secure underlay support for micro flasks of 5 to 50 ml. They feature an inner diameter of 15 mm that fits typical small laboratory flasks and hold them firmly in place. The Perbunan material ensures the rings adhere very well to smooth surfaces and do not slip on the laboratory bench. In addition they are thermally resistant up to 100 °C, allowing reliable use under moderate heat conditions common in daily lab work. Supplied in packs of 20 pieces from manufacturer Rettberg, these safety underlay rings are intended for round-bottom flasks, ground-joint flasks, distillation flasks and receiving flasks. Their non-slip grip reduces the risk of tipping or rolling during stirring, heating or sample transfer, improving bench safety when handling small glass vessels. The product originates from Germany and the pack has a net weight of 0,124 kg. Simple to position yet stable in use, the rings offer a practical solution for securing micro-scale glassware without complex additional fixtures.
This article is part of Beaker & flask accessories, in Beakers & flasks.
Key features
- Pack size: 20 pc(s)
- Material: Perbunan
- Outer diameter: 33 mm
- Inner diameter: 15 mm
- Thermal resistance: up to 100 °C
- Suitable for: micro flasks 5–50 ml
- Technical Information Sheet:
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Questions about Safety bottom rings, 20/pk Perbunan, Outer diameter 33 mm
What is this article?
Safety bottom rings, 20/pk Perbunan, Outer diameter 33 mm is the article on this page. Luminix Health distributes Rettberg for laboratory use. It sits in Beaker & flask accessories, inside Beakers & flasks, in Matériel de laboratoire.
Accessories for beakers and flasks are the cork rings, the covers, the joint clips and the holders that keep a flask upright or closed. A clip is what stops a ground joint from falling apart when it is inverted.
A beaker is an open working vessel: easy to pour, poor as a measure. An Erlenmeyer flask has a flat base and a conical wall so a liquid can be swirled without climbing out. A round-bottom flask is for heating under a condenser, because the heat meets a curved wall and the joint at the neck connects to the rest of the glassware. Borosilicate is the glass that survives the temperature change. These forms are listed under ISO laboratory glassware.
Which category should I open next?
The category is Beakers & flasks. The sub-category is Beaker & flask accessories. The catalogue is Matériel de laboratoire.
Shelves beside this one are Round-bottom flasks, Beakers, Erlenmeyer flasks, Reaction vessels & jacketed vessels, Flat-bottom flasks and Flasks (other).
What should I check before I order?
When this page shows a safety data sheet, use that manufacturer file. Hazard text does not belong in the sales description. For a pack size, a grade or a certificate that is not on the page, send a quote request or contact the team.
How does ordering and shipping work?
Luminix Health distributes this article from the heart of Europe. Articles in stock ship within 2–5 business days. Standard delivery is free from €250 excl. VAT. Cold-chain goods and dangerous goods under ADR are never included in that free delivery. The terms are in the Shipping Policy. The full brand index is on shop by brand. Who we are is on about us.
Which other categories should I open?
The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.